EP 0962015 A1 19991208 - METHOD AND DEVICES FOR CODING DISCRETE SIGNALS OR FOR DECODING CODED DISCRETE SIGNALS
Title (en)
METHOD AND DEVICES FOR CODING DISCRETE SIGNALS OR FOR DECODING CODED DISCRETE SIGNALS
Title (de)
VERFAHREN UND VORRICHTUNGEN ZUM CODIEREN VON DISKRETEN SIGNALEN BZW. ZUM DECODIEREN VON CODIERTEN DISKRETEN SIGNALEN
Title (fr)
PROCEDE ET DISPOSITIFS DE CODAGE DE SIGNAUX DISCRETS OU DE DECODAGE DE SIGNAUX DISCRETS CODES
Publication
Application
Priority
- DE 19706516 A 19970219
- EP 9706633 W 19971128
Abstract (en)
[origin: US6370507B1] In a method of coding discrete time signals (X1) sampled with a first sampling rate, second time signals (x2) are generated using the first time signals having a bandwidth corresponding to a second sampling rate, with the second sampling rate being lower than the first sampling rate. The second time signals are coded in accordance with a first coding algorithm. The coded second signals (X2c) are decoded again in order to obtain coded/decoded second time signals (X2cd) having a bandwidth corresponding to the second sampling frequency. The first time signals, by frequency domain transformation, become first spectral values (X1). Second spectral values (X2cd) are generated from the coded/decoded second time signals, the second spectral values being a representation of the coded/decoded time signals in the frequency domain. To obtain weighted spectral values, the first spectral values are weighted by means of the second spectral values, with the first and second spectral values having the same frequency and time resolution. The weighted spectral values (Xb) are coded in accordance with a second coding algorithm in consideration of a psychoacoustic model and written into a bit stream. Weighting the first spectral values and the second spectral values comprises the subtraction of the second spectral values from the first spectral values in to obtain differential spectral values.
IPC 1-7
IPC 8 full level
G10L 19/24 (2013.01); H03M 7/02 (2006.01); H04B 14/04 (2006.01); G10L 19/02 (2013.01)
IPC 8 main group level
G10L (2006.01)
CPC (source: EP KR US)
G10L 19/24 (2013.01 - EP US); H03M 5/00 (2013.01 - KR); G10L 19/0204 (2013.01 - EP US)
Designated contracting state (EPC)
AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
DOCDB simple family (publication)
US 6370507 B1 20020409; AT E205010 T1 20010915; AU 5557198 A 19980909; AU 711082 B2 19991007; CA 2267219 A1 19980827; CA 2267219 C 20030617; CN 1117346 C 20030806; CN 1234897 A 19991110; DE 19706516 C1 19980115; DE 59704485 D1 20011004; DK 0962015 T3 20011008; EP 0962015 A1 19991208; EP 0962015 B1 20010829; ES 2160980 T3 20011116; JP 2000508091 A 20000627; JP 3420250 B2 20030623; KR 100308427 B1 20010929; KR 20000069494 A 20001125; NO 317596 B1 20041122; NO 992969 D0 19990617; NO 992969 L 19990617; WO 9837544 A1 19980827
DOCDB simple family (application)
US 31906699 A 19990528; AT 97951997 T 19971128; AU 5557198 A 19971128; CA 2267219 A 19971128; CN 97199177 A 19971128; DE 19706516 A 19970219; DE 59704485 T 19971128; DK 97951997 T 19971128; EP 9706633 W 19971128; EP 97951997 A 19971128; ES 97951997 T 19971128; JP 53618198 A 19971128; KR 19997005356 A 19990615; NO 992969 A 19990617